Figure 3.

Specific AR activities in roots of Chinese brake fern. Chinese brake fern plants were cultured as described in “Materials and Methods,” and were then treated with arsenate for periods indicated in the graph. The measurements were performed at 30°C, pH 6.5, using the following reaction mixture: buffer + 1.5 mm NADPH + 1 unit GR + 1 mm GSH + 10 mm arsenate + 100 μL root extract.